System information

Configuring the CMTS
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Use the hop threshold flap command in Cable Spectrum Group mode to set a value
that triggers when a greater than a set percentage of CMs loose their connectivity, as
shown below:
MOT(config-spcgrp:<WORD>)#hop threshold flap {<num:1-100>}
where:
WORD is the spectrum group name.
num:1-100 is the percentage of CMs from 1 to 100 that loose connectivity on the
network.
If an existing percentage other than zero is set, and you need to take some action that
causes CMs to flap (such as changing the downstream frequency), use the no hop
threshold flap command in Cable Spectrum Group mode to deactivate the frequency
hopping threshold before taking the action, as shown below:
MOT(config-spcgrp:<WORD>)#no hop threshold flap <num:1-100>
where:
WORD is the spectrum group name.
num:1-100 is the set percentage of CMs that loose their connectivity on the
network.
Enabling and Disabling Spectrum Roll-back
The spectrum roll-back function is disabled by default and is used to return the
upstream channel width or modulation profile setting, that was adjusted during a hop
action, to the original configuration when upstream channel conditions improve.
To enable the spectrum roll-back function, use the hop action rollback command in
Cable Spectrum Group mode as shown below:
MOT(config-spcgrp:<WORD>)#hop action rollback
where:
WORD is the spectrum group name.
To disable the spectrum roll-back function, use the no hop action rollback command.